Question

in triangle ABC AB=BC,angle B=80 Then angle A=?

Answer 1

angle a =50 °. >>>>>>>

Answer 2

Answer:

In triangle ABC, BC=AB and angle B= 80, then angle A = 50

Step By Step Explanation:

Given,

triangle ABC, BC = AB which means ABC is an isosceles triangle.

We know the sum of angles in a triangle is 180°. Since it is an isosceles triangle the measure of two angles will be same.

Let ∠A = x and ∠c = x

We know, Sum of all angles = 180°

x+x+80° = 180°

2x= 180°-80°

2x=100°

x= 100÷2=50

∴ the measure of ∠A = 50°

hOpE iT HeLpEd !!!